re: Leonardo/Galileo, yes they are playable now after I fixed the lockup problem yesterday (bug in CPU timer). I still need to hook up battery-backed RAM and the GO/ACL/STOP buttons.

Leonardo indeed has a 6301Y, but it is operating in external mode. The internal rom (that isn't dumped) is luckily unused.
I think in the case of Super VIP, the 16KB internal ROM is actually used.

Funny fact: the MCU SX8A 6301Y0G84P in Renaissance is actually the same one as in Saitek Conquistador. In other words, they used leftover stock 6301Y in place of 6303Y.